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| Paper: |
A GPU-based Survey for Millisecond Radio Transients Using ARTEMIS |
| Volume: |
461, Astronomical Data Analysis Software and Systems XXI |
| Page: |
33 |
| Authors: |
Armour, W.; Karastergiou, A.; Giles, M.; Williams, C.; Magro, A.; Zagkouris, K.; Roberts, S.; Salvini, S.; Dulwich, F.; Mort, B. |
| Abstract: |
Astrophysical radio transients are excellent probes of extreme physical
processes originating from compact sources within our Galaxy and beyond. Radio
frequency signals emitted from these objects provide a means to study the
intervening medium through which they travel. Next generation radio telescopes
are designed to explore the vast unexplored parameter space of high time
resolution astronomy, but require High Performance Computing (HPC)
solutions to process the
enormous volumes of data that are produced by these telescopes. We have
developed a combined software/hardware solution (code named ARTEMIS) for
real-time searches for millisecond radio transients, which uses GPU
technology to remove interstellar dispersion and detect millisecond radio bursts
from astronomical sources in real-time. Here we present an introduction to
ARTEMIS. We give a brief overview of the software pipeline, then focus
specifically on the intricacies of performing incoherent
de-dispersion. We present results
from two brute-force algorithms. The first is a GPU based algorithm,
designed to exploit the L1 cache of the NVIDIA Fermi
GPU. Our second algorithm is CPU based and exploits the new AVX units in Intel
Sandy Bridge CPUs. |
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